The melting behavior of a low density polyethylene powder in a screw extruder

1981 ◽  
Vol 21 (2) ◽  
pp. 86-92 ◽  
Author(s):  
A. P. D. Cox ◽  
J. G. Williams ◽  
D. P. Isherwood
Keyword(s):  
Melting Behavior ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Screw Extruder ◽  
Polyethylene Powder

scholarly journals Rancang Bangun Alat Screw Extruder Untuk Pembuatan Papan Partikel Campuran Tandan Kosong Kelapa Sawit dan Plastik LDPE

2021 ◽  
Vol 1 (10) ◽  
pp. 403-413
Author(s):  
Dytha Florenza ◽  
Anerasari Meidinariasty ◽  
Erwana Dewi
Keyword(s):  
Low Density Polyethylene ◽  
Low Density ◽  
Screw Extruder ◽  
Pre Treatment

Screw Extruder merupakan mesin dengan penggerak motor DC dengan pemanas berupa band heater sebagai elemen utama dengan jenis plastic yang akan dilelehkan. Penelitian ini bertujuan untuk membuat alat screw extruder untuk pencampuran serbuk tandan kosong kelapa sawit dan plastik Low Density Polyethylene (LDPE) menjadi papan partikel ukuran 20x10 yang memenuhi SNI 03-2015-2006 untuk pelapis dinding ruangan. Percobaaan dilakukan dengan tiga tahapan proses yaitu pre-treatment tandan kosong kelapa sawit, tahap pembuatan papan partikel dengan menggunakan alat  screw extruder, dan tahap analisa papan partikel yang dihasilkan. Parameter yang diukur ialah kerapatan, kadar air, penambahan tebal, dan daya serap air dari papan partikel yang dihasilkan dengan variasi komposisi bahan TKKS:LDPE 20:80, 25:75, 30:70, 35:75, 40:60, dan variasi suhu extruder 250ºC, 270ºC, dan 290ºC dengan putaran screw tetap sebesar 20 rpm. Perancangan alat screw extruder ini memiliki kapasitas maksimal 19 kg/jam dengan putaran screw maksimal 100 rpm.  Komposisi TKKS:LDPE 20:80 dengan suhu extruder 290ºC menghasilkan papan partikel dengan nilai kerapatan sebesar 0,75 gr/cm3 dengan kadar air minimum 0,11%, daya serap air minimum 13,04%, dan penambahan tebal minimum sebesar 3,05%. Dari variasi suhu extruder 250ºC, 270ºC, dan 290ºC yang telah dilakukan pada pembuatan papan partikel, didapatkan kondisi optimum yaitu pada suhu extruder 290ºC dan kondisi optimum variasi komposisi TKKS:LDPE adalah sebesar 20:80. Papan partikel  yang dihasilkan dari alat screw extruder telah memenuhi SNI 03-2015-2006 dengan kondisi optimum suhu ektruder 290ºC dan kondidi optimum perban komposisi TKKS:LDPE adalah 20:80.

Flame Retardant Low Density Polyethylene with Aluminium Hydroxide/ Commercial Fire Retardants FR01 Synergistic System

2013 ◽  
Vol 652-654 ◽  
pp. 485-489 ◽  
Author(s):  
Ni Na Wang ◽  
Ding Han Xiang ◽  
Pin Shu Mo ◽  
Yi Lu
Keyword(s):  
Flame Retardancy ◽  
Aluminium Hydroxide ◽  
Volume Resistivity ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Fire Retardants ◽  
Screw Extruder ◽  
Limiting Oxygen Index ◽  
Twin Screw ◽  
Ldpe Composites

Low density polyethylene (LDPE) was modified by the addition of commercial fire retardants FR01 and aluminium hydroxide (ATH). ATH/FR01/LDPE composites were prepared by melt blending and extrusion in a twin-screw extruder. ATH was first modified by a silane coupling agent KH550 then added to LDPE. The flame retardancy, electrical property and thermal behavior of the LDPE composites were investigated by limiting oxygen index (LOI), volume resistivity and thermogravimetric analysis (TGA), respectively. The results indicated that the surface modification of ATH (M-ATH) could greatly improve the dispersibility and compatibility with LDPE matrix. The mechanical property tests showed good mechanical properties of composite, compared with unmodified one, tensile strength and elongation of M-ATH/LDPE were all improved, and the addition of FR01 improved the flame retardancy of ATH/LDPE remarkably. TGA results demonstrate that char yield of M-ATH/FR01/LDPE (30/15/70) reaches 27 wt% at 600 °C in Ar atmosphere.

Characterization of Linear Low Density Polyethylene/Rambutan Peels Flour Blends: Effect of Loading Content

2016 ◽  
Vol 673 ◽  
pp. 171-179 ◽  
Author(s):  
A. Ainatun Nadhirah ◽  
S.T. Sam ◽  
N.Z. Noriman ◽  
Mohd Mustafa Al Bakri Abdullah ◽  
Mohd Firdaus Omar ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Tensile Properties ◽  
Testing Machine ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Linear Low Density Polyethylene ◽  
Screw Extruder ◽  
Twin Screw ◽  
Flour Blends

The effect of rambutan peels flour (RPF) content on the tensile properties of linear low density polyethylene filled with rambutan peel flour was studied. RPF was melt blended with linear low–density polyethylene (LLDPE). LLDPE/RPF blends were prepared by using twin screw extruder at 150°C with the flour content ranged from 0 to 25 wt%. The tensile properties were tested by using a universal testing machine (UTM) according to ASTM D638. The highest tensile strength was pure LLDPE meanwhile the tensile strength LLDPE/RPF decreased gradually with the addition of rambutan peels flour. Young’s modulus of rambutan peels flour filled LLDPE increased with increasing fiber loading. The crystallinity of the blends was significantly reduced with increasing RPF content. Instead, the water absorption increased with the addition of RPF content.

DSC melting behavior of drawn and gamma-irradiated low-density polyethylene

1997 ◽  
Vol 56 (2) ◽  
pp. 227-233 ◽  
Author(s):  
Z. Kačarević-Popović ◽  
D. Kostoski ◽  
Z. Stojanović ◽  
V. Doković
Keyword(s):  
Melting Behavior ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Gamma Irradiated

scholarly journals MgO-Lignin Dual Phase Filler as an Effective Modifier of Polyethylene Film Properties

Materials ◽  
2020 ◽  
Vol 13 (3) ◽  
pp. 809 ◽  
Author(s):  
Karol Bula ◽  
Grzegorz Kubicki ◽  
Teofil Jesionowski ◽  
Łukasz Klapiszewski
Keyword(s):  
Lignin Content ◽  
Mechanical Tests ◽  
Low Density Polyethylene ◽  
Low Density ◽  
Screw Extruder ◽  
Hybrid Filler ◽  
Tear Strength ◽  
Twin Screw ◽  
Time Required ◽  
Almost All

Functional magnesium oxide-lignin hybrid materials were obtained via mechanical grinding. Their particle shape and size as well as physicochemical properties were characterized. MgO-lignin materials with biocomponent content (between 20% and 80% amount of total weight of filler) were used as a partially bio-structured modifier of low density polyethylene. The composites with 5% by weight of dual fillers and polyethylene grafted with maleic anhydride were compounded in a twin screw extruder working in co-rotating mode. The prepared blends were cast extruded using a single screw extruder and laboratory cast line. The properties of the obtained films were verified in case of their weldability. The seal strength as well as shear test and tear strength of the welded sheets were examined. The results showed that the shortest equivalent time required to perform correct weld occurred in the system, where the highest amount of lignin was used in hybrid filler MgO-L (1:5 w/w). From mechanical tests of welds, a sharp increase in ultimate seal force was noticed for almost all compositions with lignin, especially where MgO was coupled with a high lignin content. For those composition seal open force raised up to 37.0 N, from the value of 23.6 N, achieved for neat low density polyethylene (LDPE). Tear strength of weld sheets confirmed once more that LDPE composition with MgO-L (1:5 w/w) achieved the highest ultimate force with its value of 71.5 N, and it was ~20.0 N higher than in the case of neat LDPE.

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